如何從Action Attribute返回Json對象？

Question

當重寫OnActionExecuting時，如何返回Json結果而不傳遞給操作？

Answer 1

public override void OnActionExecuting(ActionExecutingContext filterContext) 
{ 
    if (/* whatever */) 
    { 
     var result = new JsonResult(); 
     result.Data = /* json data */; 
     filterContext.Result = result; 
     return; 
    } 

    base.OnActionExecuting(filterContext); 
    return; 
}